Collapsible carton



COLLAPSIBLE CARTON Filed June 28, 1935 2 Sheets-Sheet 1 INVENTOR:

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Nov. 26, 1935. a. J. BACHMEYER 'coLLAPsIBLE CARTON Filed June 28, 1935 2 Sheets-Sheet 2 INVENTOR.

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Patented Nov. 26, 1935 PATENT OFFICE 2,621,980 coLLArsIBLc osn'ron George J. Bachmeyer, Kalamazoo, Mich, assignor UNITED sTATEs to Smith Hoover and mazoo, Mich.

Bert Modderman, Kala- Application June 28,1935, Serial No. cam

This invention relates to cartons and more particularly to collapsible cartons of the type formed of a single piece of paper board.

The main objects of my invention are:- I

First, to provide a collapsible carton which is strong and rigid even when formed of comparatively light stock.

Second, to provide means for taking care of the stock when folded, without cutting the blank.

Third, to provide an improved method of folding a collapsible carton, the folding operations whencompleted leaving the carton in collapsed condition, ready for erection.

Fourth, to provide a carton which is simple and economical in its parts, easy to manufacture, and very efiic ient and effective for the purpose intended.

I attain these objects by the device illustrated in the accompanying drawings, in which- Fig. l is a plan view of the blank of the carton in the flat.

' Fig. 2 shows the front wall of the box folded' over the bottom panel, the initial folding operation.

Fig. 3 shows the end walls of the box and cover folded over the bottom panel and cover respectively.

Fig. 4 shows the carton after the folding operationshave been completed.

Fig. 5 shows the collapsed carton with the cover turned back, the initial erecting operation. Fig. 6 is a view in end elevation of Fig. 5. Fig. 7 is a view in front elevation of the carton after erection, the cover being open.

Fig. 8 is a view in end elevation of the erected carton. Y Fig. 9- is a top plan'view of the carton with the cover in open position; and

Fig. 10 is aperspective view of the carton with the cover in closed position.

Referring to Fig: 1, the rectangular blank I, preferably formed of box board, is cut and scored, as shown,.to provide a box 2 and a cover 3 therefor when folded and erected. The box has a bottom panel 4, and a front wall 5, a rear wall 6,

tangular corner panels l2, l2 between-the walls of the cover are divided into inner triangular folds l3 and outer triangular folds H by diag- 12 Claims. (01. 229-'-3ll) onal fold lines 95. The end walls I of the box are cut to provide keepers it near the front edges of the box.

The blank 5 is embossed at H in the areas of the fold lines it to provide pockets to receive the stock of the corner folds when the blank is folded to form the carton in collapsed condition.

The embossing is'preferably made at the same time as the cutting and scoring, the depth of each pocket being" approximately twice the thickness of the blank. By embossing the blank as described above, I can fold relatively thick box board in the manner described below.

The front wall 5 of the box is first folded over the bottom panel *1, as shown by Fig. 2. With 15 the front wall in this position, adhesive l9, i9 is applied to the inner folds I3 at the ends of the front wall, and to the corresponding triangular areas not the front wall overlapped by the innerfolds when the end walls I and 9 of the box hesive is applied to the inner folds I3 at the end walls of the box and'cover, and to the correspending areas 2| and 22 overlapped by the inner folds when the front wall 8 of the cover is folded over the cover, and the rear wall 6 of the. box is folded over the bottom panel 4, as shown by Fig. 4. The pockets provided by the embossed areas I! make room for the two layers of stock formed by the first folding of the corner panels and adjacent walls of the carton. This is a very impbrtant feature of my invention, inasmuch as it enables me to fold a carton from a single integral blank in the manner described, without otherwise deforming or cutting the blank. The embossing is .in the direction of the crease anddoes not mar the'attractive appearance of the carton. Further.

the collapsed carton, as shown by Figs. 4, 5, and 6,

' the overlapping parts are substantially flat, the

embossed pockets thus eliminating objectional buckling which would otherwise be present.

The carton formed in the foregoing manner Fig. 5, to expose the collapsed box 2. Thethumbs are inserted under the end walls lof the box to pull the end walls outwardly and upwardly to an upright position, this act raising the front and rear walls 5 and i of the box, as shown by Figs. 7,8, and 9. The keepers IS in the end walls are then bent orturned inwardlyto engage the front wall' '3 and ,hold the box in set-up position.

is I set up by turning the cover 3 back, as shown by Finally the end walls 9 of the cover are pulled to an upright position, this act automatically raising the front wall of the cover. The cover is closed over the box while holding the end walls of the cover clear of the end walls of the box, Fig. 10.

The erected carton 28 is very strong and-rigid, owing to my novel construction, even when the blank is formed of comparatively light board. The inner folds l3 are united throughout their overlapping areas to the corresponding areas of the walls of the carton, both when the carton is erected, and when the parts are collapsed. The outer triangular folds M are free to turn relative to the inner folds 13 in erecting and collapsing the walls of the carton.

It will thus be apparent to those skilled in the art that I provide a carton which is simple and economical in its parts, and very eflicient and effective for the purpose intended, considering the weight of the stock which may be used. Cutting of the blank is reduced to a minimum and is almost entirely eliminated in my construction.

other liquid material because of the impervious structure of my carton; the keepers l6 being omitted where the box is filled by a mass acting to hold the walls of the box open.

I claim:

1. A collapsible carton comprising an integral rectangular blank cut, scored and folded to provide a box and a cover, the box having a bottom panel, and front, rear and end walls extending upwardly therefrom, the front wall being connected to the end walls by triangular inner and outer folds overlapping the front wall, and the end walls being connected to the rear wall by triangular inner and outer folds overlapping theend walls, the blank being embossed to provide pockets to receive the stock of the folds when the box is collapsed, adhesive means uniting each inner fold to its wall of the box, the outer folds being free to turn relative to their inner folds, and keeper means turned inwardly from the end walls and engaging the front wall to hold the latter in upright position, the cover extending from said rear wall and having front and end walls overlapping the corresponding walls of the box, the walls of the cover being connected by means similar to the connection between the rear and end walls of the box, the cover being embossed to provide pockets to receive the stock of the folds when the cover is collapsed.

2. A collapsible carton comprising an integral rectangular blank cut, scored and folded .to provide a box, the box having a bottom panel, and front, rear and end walls extending upwardly therefrom, the front wall being connected to theend walls by triangular inner and outer folds overlapping the front wall, and the end walls being connected to the rear wall by triangular inner and outer folds overlapping the end walls, the blank being embossed to provide pockets to receive the stock of the folds when the box is collapsed, adhesive means uniting each inner fold to its wall of thebox, the outer folds being free to turn relative to their inner folds, and keeper means turned inwardly from the end walls and engaging the front wall to hold the latter in upright position.

3. A collapsible carton comprising an integral rectangular blank cut, scored and folded to provide a box and a cover, the box having a bottom 5 panel, and side and end walls extending upwardly therefrom, thev side walls being connected to the end walls by triangular inner and outer folds overlapping outer sides of the box, and adhesive means uniting the inner folds to the walls of the box, the outer folds being free to turn relative to their inner folds, and inturned keeper means turned inwardly from the end walls and engaging a side wall to hold the latter in upright position, the cover extending from aside wall 15 and having side and end walls overlapping the corresponding walls of the box, the walls of the cover being connected by means similar to the connection between the rear and end walls of the box, the blank having embossed pockets in the 20 areas of the fold lines adapted to receive the stock of the corner folds when. the carton is collapsed.

4. A collapsible carton comprising an integral rectangular blank cut, scored and folded to provide a box and a cover, the box having a bottom 25 panel, and side and end walls extending upwardly therefrom, the sidewalls being connected to the end walls by triangular inner and outer folds overlapping outer sides of the box, and means. uniting the inner folds to the walls of the box, and the outer folds being free to turn relative to their inner folds, the cover xtending from a side wall and having side an end walls overlapping the corresponding walls of the box, the walls of the cover being connected by means similar to the connection between the rear and end walls of the box, the blank having embossed pockets in the areas of the fold lines adapted to receive the stock of the comer folds when the carton is collapsed. i

5. A collapsible carton comprising an integral rectangular blank cut, scored and folded to provide a-box, the box having a bottom panel, and side and end walls extending upwardly therefrom, the side walls being connected to the end 46 walls by triangular inner and outer folds overlapping outer sides of the box, and means uniting the inner folds to the walls of the box, the

outer folds being free to turn relative to their inner folds, the blank having embossed pockets 50 in the areas of the fold lines adapted to receive the stock of the corner folds when the carton is collapsed.

' 6. The method of making a collapsible carton which comprises cutting and scoring a rectangu- 55 lar blank to provide a box and a cover, the box having a bottom panel and front, rear and end walls extending therefrom, the cover extending from the rear wall of the box and having front and end walls adapted to overlap the correspond- 60 ing walls of the box, the rectangular corner panels between the walls of box and the walls of the cover being divided into inner and outer triangular folds, the end walls, of the box having keepers near the front edges thereof, embossing 65 the blank in the areasof the fold lines to provide pockets to receive the stock of the corner folds when the blank is folded to form the carton in collapsed condition, folding the front wall of the box over the'bottom panel, applying an adhesive 7 to the inner folds at the ends of the front wall. foldingthe. end walls of the box and cover over the bottom panel and cover respectively, applying an adhesive to theinner folds at the ends of the end walls of the box and cover respectively, foidfront wall and hold the box in seteup position,

pulling the end walls of the cover to upright position, this act raising the front wall of the cover,

and closing the cover over the box while holding the end walls of the cover clear of the end walls of the box.

'7. The method of making a collapsible carton which comprises cutting and scoring a rectangular blank to provide a box, the box having a bottom panel and front, rear and end walls extending therefrom, the rectangular corner panels between the walls of box being divided into inner and outer triangular folds, the end walls of the box having keepers near the front edges thereof,

embossing the blank in the areas of the fold.

lines to provide pockets to receive the stock of the comer folds when the blank is folded to form the carton in collapsed condition, folding the front wall of the box over the bottom panel, ap-

plying an adhesive to the inner folds at the ends of the front wall, folding the end walls of the box over the bottom panel, applying an adhesive to the inner folds at the ends of the end walls of the box and folding the rear wall of the box over the bottom panel, the carton being set up by pulling the end walls of the box to, an upright position, this act raising the front and rear walls of the box, bending the keepers in the end walls to engage the front wall and hold the box in setup position.

8. The method of-making a collapsible carton which comprises cutting and scoring a rectangular blank to provide a box, the box having a bottom panel and front, rear and end walls extending therefrom, the rectangular corner panels between the walls of box being'divided into inner and outer triangular folds, and embossing the blank in the areas of the fold lines to provide pockets to receive the stock of the corner folds when the blank is folded to form the carton in -collapsed condition, folding the front wall of the box over the bottom pariel, applying an adhesive to the inner folds at the endsof the front wall, folding the end walls of the box over the bottom panel, applying an adhesive to the inner folds at the ends of the end walls of the box, and folding the rear wall of the box over the bottom panel, the cartonbeingset up by pulling the end walls of the box to an upright position, this act raising the front and rear walls of the box.

9. The method of making a. collapsible carton which comprises cutting and scoring a rectangular blank to provide a box and a cover, the boxhaving a bottom panel and front, rear and end walls extending therefrom, the cover extending from the rear wall of the box and having front and end walls adapted to overlap the corresponding walls of the box, the rectangular cor; ner panels between the walls of box and cover being divided into inner and outer triangular folds, embossing the blank in theareas of the fold lines to provide room for the corner folds 5 which are integral with the blank, folding the front wall of the box over the bottom panel, folding the end walls of the box and cover over the bottom panel and cover respectively, securing the inner triangular folds to the front wall 10 of the box, folding the front wall of the cover over the cover, securing the inner triangular folds to the front wall of the cover, folding the rear wall of the box over the bottom panel, and

the cover to upright position, this act raising the front wall of the cover, and closing the cover over the box while holding the end walls of the cover clear of the end walls of the box.

10. The method of making a collapsible carton which comprises cutting and scoring a rectangular blank to provide a box having a bottom panel and side and end walls extending therefrom, the rectangular corner panels between the walls of box being divided into inner and outer triangular folds, and conforminglthe blank in I the areas of the fold lines to receive the stock of the corner panels when the carton is collapsed, folding one side wall of the box over the bottom panel, applying adhesive to the inner folds at the ends of the last named wall, folding the end walls of the box over the bottom panel, applying adhesive to the inner folds at the ends or the end walls of the box, and folding the other side wall 40 of the box over the bottom panel, the carton being set up by pulling the end walls of the box to an upright position, this act raising the side walls of the box.

11. A collapsible carton comprising an integral 5 rectangular blank of fiber-board having a bottom panel and side and end walls extending therefrom, the walls at the corners of the carton being connected by triangular folds, the inner folds being secured to the adjacent walls, and the outer folds being free to turn relative to their inner folds to set-up and collapse the walls relative to the bottom panel, the blank being embossed to provide room for the folds and walls when the carton is collapsed.

12. A collapsible carton comprising a corner construction wherein the corner panel of the blank is diagonally folded with the inner fold secured to the adjacent wall, the blank being embossed in the fold line of the other wall and the 60 bottom of the carton to make room for the fold between the corner panel and the first-named 

